Evaporating-pan



UNITED STATES PATENT OFFICE.

HUGHO. DAMES, on NEW ORLEANS, LOUlSIANA.

EVAPORATINHG-PAN.

SPECIFICATION forming part of Letters Patent No. 276,324, dated April 24, 1883.

' Application filed December 18, 1882. (No model.)

To all whom it may concern:

Be it known that I, HUGH O.A1uEs, of New Orleans, in the parish of Orleans and State of Louisiana, have invented a newand Improved Evaporating-Pan, of which the following is a full, clear, and exact description.

This invention pertains to improvements upon my pan for evaporating eane-juice for 'whieh Letters Patent No. 235,613 were granted to m'eDeceinber 21, 1880, wherein l employed, in connection with a branched steam-pipe, two seriesof alternating heating-pipes, 'with their inner ends provided with downwardly-extended pockets for the condensed steam, from which the condensed steam passed off into correspondingly constructed condensed steampipes connected with a branched dischargein which similar letters of reference-indicate corresponding parts in all the figures.

Figure l is a sectional plan view of an evaporating-pan with my improvements. Fig. 2 is transverse section of the same, and Fig. 3 is a detail view. we l 'E is an evaporatingpan of the usual size and shape.

B is the main steam or stock pipe.

C is the condensedsteam pipe, and D D are the evaporating-pipes connected to the pipes B O, the whole forming a horizontal grate within the pan. The ends of the stock-pipe B are fitted to turn steam-tight in the trunnions b b, so that the grate may be turned upward tor facility of cleaning the pipes.

A is the main steam-supply pipe, provided with a suitable valve for regulating the inlet of steam, and branched to connect with the stock-pipe B at both the trunnionsb, so that when the steam is supplied from the boiler it will pass to both ends ofthe pipeB, and thence to the evaporating-pipes D,wherein the steam is condensed, and the water flows to the pipe 0 and out at the outlet a. As shown in Fig. 3, the pipe 0 is formed with a gutter, d, which is inclined from the ends of the pipe 0 toward the outlet at the middle. The object of this inclined gutter is to drain the water from the evaporating-pipe to the lowest point, so as to utilize all the surface of the pipes B for heatin g purposes.

By supplying steam to the pipe B at both ends a more complete effect in boiling is obtained than where the steam is furnished at one end only of the steam-pipe, for the reason that if steam be supplied at one endonly, the heat being greater at that point, the greater part of the scum will be thrown toward the opposite corner diagonally, and the circulation of the liquid is also greatest in the same direction.

With my improvements, the heat being equally distributed across the end of the pan, the circulation in boiling is uniform across the whole body'of the liquid and at right angles to the pipe B, so that the seams will be carried toward the pipe 0, where they are skimmed oft. In this manner all parts of the liquid being boiled are brought into contact with the heat uniformly, the evaporation is thereby hastened, and the scums thrown off more perfectly and rapidly. This is an important advantage, as it reduces the time during which the liquid is subjected to-the heat.

When the pan is to be used as a strike pan, for concentrating the sirup tothe striking or sugar point, the grate will be made double-that is to say, two grates will be used, hinged at opposite ends of the panand by that arrangement a uniform temperature will prevail over the whole area of the pan, and the whole body of the sirup will be brought to the striking-point simultaneously.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In evaporating-pans, the combination and arrangement of the steam or stock pipe B of the grate, and steam-supply pipe A, substantially as described, for supplying steam at both ends of the stock-pipe.

2. In evaporatingpans, the combination of the steampipe A, the stock-pipe B, the evapcrating-pipes D, and condensed-steam pipe 0, substantially as shown and described.

3. In evaporating-pans, the condensed-steam pipe 0, formed with thelongitudinal gutter d, and combined with the evaporating-pipes D, substantially as described.

Witnesses: HUGH OSWALD AMES.

P. A. ORY, S. THERooT, Jr. 

